Apparatus and method for processing audio signals recorded on a medium

ABSTRACT

This invention relates to a karaoke CD format and a device for controlling audio signals utilizing the karaoke CD format which provides a user with selective reproduction of the voice of a player. The karaoke CD format includes a CD format divided into video sectors and audio sectors. The audio sectors are further divided into a part for recording accompaniment sound and playing sound at the same time and a part for recording accompaniment sound only. There is provided record coding information for distinguishing the parts.An apparatus, method and storage medium for processing digital data are discussed. According to an embodiment, the apparatus includes an audio/video data processor to receive data units of digital audio data and data units of digital video data, the data units of digital audio data being multiplexed with data units of digital video data, the data units of digital audio data corresponding to at least one of: 1)  a first type of digital audio data, and 2 )  a second type of digital audio data which includes at least one content different from the first type of digital audio data; each type of digital audio data being specified by attribute information, which has: a )  first information for indicating a coding mode of the digital audio data, and b )  second information, different than the first information, for identifying one of the first type of digital audio data and the second type of digital audio data, and the digital video data associated with two types of digital audio data.

This application is a Continuation Reissue application of U.S. Reissueapplication Ser. No. 11/058,630 filed on Feb. 16, 2005, which isContinuation reissue of U.S. Reissue application Ser. No. 10/848,616filed on May 19, 2004 (now abandoned), which is a reissue of U.S. Pat.No. 6,721,249 (application Ser. No. 09/209,280 filed Dec. 11, 1998 ),which is a divisional of U.S. application Ser. No. 08/735,572 filed Oct.23, 1996 (U.S. Pat. No. 6,535,467 ), which is a continuation of U.S.application Ser. No. 08/307,288 filed Sep. 16, 1994 (now abandoned), allof which are herein incorporated by reference. The present applicationalso claims foreign priority benefits of Korean Patent Application No.93 - 18841 filed Sep. 17, 1993 in Republic of Korea. The entirety ofeach of the above-identified documents is hereby incorporated byreference. Note: More than one reissue application has been filed forthe reissue of U.S. Pat. No. 6,721,249. The reissue applications areapplication Ser. Nos. 10/848,616 (grandparent of the presentapplication—now abandoned); 10/848,617 (child of U.S. Pat. No.6,721,249—now abandoned); 11/058,630 (parent of the presentapplication); 11/905,506 (child of application Ser. No. 11/058,630 );12/142,642; 12/142,658; 12/142,663; 12/142,674 (the presentapplication); 12/142,680; and 12/142,684.

This is a division of application Ser. No. 08/735,572, filed Oct. 23,1996, now U.S. Pat. No. 6,535,467, which is a continuation of08/307,288, filed Sep. 16, 1994, now abandoned.—all of which areincorporated herein by reference.

BACKGROUND OF THE INVENTION

1. Field of the Invention

This invention relates to a karaoke CD system, more particularly to akaraoke CD format and a device for processing audio signals utilizingthe karaoke CD format which provides a user with selective reproductionof the voice of a player.

2. Description of Related Art

As shown in FIG. 1, a general disc data layout of a karaoke CD includeslead in/lead out areas 1 and 6 formed at the lead in and lead out of theCD for encoding CD-ROMXA data containing empty sectors of mode 2/form 2therein, and program areas 2, 3, 4, and 5.

The program areas include a volume descriptor area 2 formed next to thelead in area 1 containing the path name of a CDI application programdescribed in compact disc bridge system description. The basic data area3 is for recording the title of a song, the name of the singer, thecomposer of the song, and the songwriter. The CDI application programarea 4 is for recording an application program required for convertinginto compact disc bridge system description which will facilitate theoperation of a disc in CD-RTOS (Real Time Operating System) in aCD-I/FMV player. The MPEG data area 5 is for recording MPEG (MovingPicture Experts Group) video and audio data.

The lead in area 1 has records of the number of songs, the period oftime of each song and total period of time, and the lead in part andindex part of each song. The lead out area 6 has record of the end ofthe program.

As shown in FIG. 2, a conventional karaoke CD system includes a firstdemodulation part 11 for demodulating EFM (Eight to Fourteen Modulation)signals. A second modulation part 12 for demodulating signals recordedin interleaved sectors for a CD-ROM upon receiving signals from thefirst demodulation part 11. A CPU 16 for demultiplexing system flow onreceiving signals from the second demodulation part 12. A first, and asecond memory 17 and 18 for storing video and audio data received fromthe CPU 16 respectively. A MPEG video decoder 19 and a MPEG audiodecoder 20 for decoding MPEG video signals and MPEG audio signals of thevideo and audio data stored in the first and the second memories 17 and18 respectively. A STC (System Time Clock) 23 for clocking the systemtime under the control of the CPU 16. A video and audio signalprocessing part 13 having a video presentation part 21 for comparing theSTC of the STC part 23 to PTS (Presentation Time Stamps) in the bitstream received from the MPEG video decoder 19. An audio presentationpart 22 for comparing the STC of the STC part 23 to PTS (PresentationTime Stamps) in the bit stream received from the MPEG audio decoder 20.A control part 10 for controlling both the first and the seconddemodulation parts 11 and 12 and for controlling the video and audiosignal processing part 13 according to a key signal applied thereto. ADigital-to-Analog (D/A) converter 14 for converting the video signalreceived from the video presentation part 21 and outputting theconverted signal to a monitor under the control of the control part 10,and a D/A converter 15 for converting the audio signal received from theaudio presentation part 22 and applying the converted signal to aspeaker under the control of the control part 10.

The interleaving of a conventional MPEG video and MPEG audio sectors isas shown in FIG. 3.

Since the quantity of MPEG video data is much greater than the quantityof MPEG audio data, an MPEG audio sector A is periodically positioned inbetween MPEG video sectors V. For example, one MPEG audio sector A maybe present in every four MPEG video sectors V.

Shown in Table 1 is the audio channel encoding, which is to be explainedin detail hereinafter.

TABLE 1 Stereo Music Program Special Music Program CH 0 Left monowithout vocal CH 1 Right mono with vocal

The karaoke CD format includes a stereo music program having a leftaudio channel for encoding on MPEG audio channel 0 and a right audiochannel for encoding on MPEG audio channel 1, and a special musicprogram having one channel for encoding music accompaniment soundwithout vocal and the other channel for encoding music accompanimentsound with vocal.

Operation of the conventional karaoke CD system is to be explainedhereinafter.

The karaoke data is read in through a pick-up, having EFM demodulatedand CD errors corrected through the first demodulation part 11 which isan EFM/CIRC (Cross Interleave Read Solomon Code) decoder. The datainterleaved at encoding is demodulated through the second demodulationpart 12 which is a CD-ROM decoder. The data is divided into audio dataand video data through the video and audio signal processing part 13under the demultiplexing operation of the CPU 16 and applied to the MPEGvideo decoder 19 and MPEG audio decoder 20 through the first and thesecond memories 17 and 18 respectively.

The MPEG video decoder 19 and the MPEG audio decoder 20, restore thecompressed data, and compare the STC from the STC part 23 to the PTS inthe restored data to control the presentation time of the data.

However, such a conventional karaoke-CD system has the disadvantage ofbeing unable to obtain stereophony sound in the case where music withoutvocal and music with vocal of a specific music program is carried on thefirst channel (Left) and the second channel (Right).

SUMMARY OF THE INVENTION

The object of this invention is to provide a user with selectivereproduction of playing sound, i.e., voice (song of a singer) andaccompaniment sound.

These and other objects and features of this invention can be achievedby providing a karaoke CD format which is divided into video sectors andaudio sectors, and the audio sectors are further divided into a part forrecording accompaniment sound and vocal sound at the same time andanother part for recording accompaniment sound only. The audio sectorsare further provided to record coding information for distinguishingbetween the audio data stored in the two parts. There is provided adevice for controlling audio signals using a karaoke CD format includinga control means for controlling the entire system according to signalsapplied from outside the system. There is provided a demodulation meansfor demodulating a signal read in from a CD which distinguishes betweena part containing recorded accompaniment sound and vocal sound at thesame time, and another part containing recorded accompaniment sound onlyunder the control of the control means. There is provided an audiosignal processing means for processing audio signals using signalsreceived from the demodulation means and transmitting data correspondingto a first data signal corresponding to the accompaniment sound andplaying sound and a second data signal corresponding to the playingsound only, a switching means for selecting one of the first or seconddata signals and outputting the selected data under the control of thecontrol means, and a D/A converting means for converting the datareceived from the switching means and applying the converted data to aspeaker under the control of the control means.

According to an embodiment, the present invention provides an apparatusfor processing a digital data, comprising: an audio/video data processorto receive data units of digital audio data and data units of digitalvideo data, the data units of digital audio data being multiplexed withdata units of digital video data, the data units of digital audio datacorresponding to at least one of: 1) a first type of digital audio data,and 2 ) a second type of digital audio data which includes at least onecontent different from the first type of digital audio data; each typeof digital audio data being specified by attribute information, whichhas: a) first information for indicating a coding mode of the digitalaudio data, and b) second information, different than the firstinformation, for identifying one of the first type of digital audio dataand the second type of digital audio data, and the digital video databeing associated with two types of digital audio data, the audio/videodata processor including an audio data processor configured to processthe first or second types of digital audio data and a video dataprocessor configured to process the digital video data, wherein theaudio processor is configured to extract the second information includedin the digital audio data, separate the first type of digital audio datafrom the second type of digital audio data using the second informationand process at least one of first and second types of digital audiodata, and the audio/video data processor including a system time clock,a data storage to store the first and second types of digital audio dataand the digital video data, an audio presentation part to receive thesystem clock to control a presentation timing of the first or secondtypes of digital audio data and a video presentation part to receive thesystem time clock to control a presentation timing of the digital videodata; and a control circuit, coupled to the audio/video data processor,to output an audio signal corresponding to the first or second types ofdigital audio data and the digital video data.

According to an embodiment, the present invention provides a method forprocessing a digital data, comprising: receiving data units of digitalaudio data and data units of digital video data, the data units ofdigital audio data being multiplexed with data units of digital videodata, the data units of digital audio data corresponding to at least twoof: 1) a first type of digital audio data, and 2 ) a second type ofdigital audio data which includes at least one content different fromthe first type of digital audio data; each type of digital audio databeing specified by attribute information, which has: a) firstinformation for indicating a coding mode of the digital audio data, andb) second information, different than the first information, foridentifying one of the first type of digital audio data and the secondtype of digital audio data, the digital video data being associated withtwo types of digital audio data; extracting the second information;separating the first type of digital audio data from the second type ofdigital audio data using the second information; processing the first orsecond types of digital audio data and the digital video data;controlling a presentation timing of the first or second types ofdigital audio data and a presentation timing of digital video data inresponse to a system time clock, wherein the first or second types ofdigital audio data is identified by the second information, in responseto a designation for selecting one of the first and second types ofdigital audio data.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a layout of a karaoke CD data.

FIG. 2 is a block diagram of a conventional karaoke CD system.

FIG. 3 is a diagram showing a conventional interleaving of MPEGaudio/video sectors.

FIG. 4 is a diagram of a subheader in accordance with this invention.

FIG. 5 is a diagram showing an interleaving of MPEG audio/video sectorsin accordance with this invention.

FIG. 6 is a schematic block diagram of a device for controlling karaokeCD audio signal in accordance with this invention.

FIG. 7 is an operational flow diagram of a device for controllingkaraoke CD audio signals.

FIG. 8 is an MPEG audio format in accordance with this invention.

DETAILED DESCRIPTION OF THE INVENTION

This invention is to be explained in detail hereinafter, referring tothe attached drawings.

A subheader in accordance with this invention is shown in FIG. 4. Todistinguish audio data Aa, containing both vocal sound and accompanimentsound, and audio data Ab, containing only accompaniment data, there isprovided subheader information in an audio packet, the subheaderincludes coding information encoded therein with a distinguishing valueapplied thereto.

The coding information is, included into a subheader of each sector atdata encoding as a distinguishing value, standardized as $0 F in case ofMPEG video, and $7 F in case of MPEG audio, wherein new codinginformation (for example 3F) is added to use for a distinguishing signalfor the audio data sector Aa, having both vocal sound and accompanimentsound, and the audio data sector Ab having only accompaniment sound.

Interleaving of MPEG video and MPEG audio sectors is as shown in FIG. 5.The interleaving of video data and audio data sectors, in general has 4to 5 consecutive video sectors V with one audio sector A added thereto,where coding information is used to distinguish a sector containing theencoded Aa and Ab.

Since the increase of buffer size due to the newly added audio sectorsAa and Ab is infinitesimal compared to the image data, it can beignored.

That is, the karaoke CD format in accordance with this inventionincludes a CD format divided into video sectors and audio sectors, andthe audio sectors are further divided into a part Aa for recording bothaccompaniment sound and vocal sound at the same time and a part Ab forrecording accompaniment sound only, and the audio sectors are furtherprovided to record coding information for distinguishing between audiodata stored in the two parts.

As shown in FIG. 6, a device for controlling a karaoke CD audio signalin accordance with this invention in a state having the audio datainterleaved as explained above, includes a control part 30, ademodulation part 40, an audio signal processing part 70, a switch 50,and a D/A converting part 60.

The control part 30 controls the entire system according to the signalapplied through a key matrix 80.

The demodulation part 40 includes a first demodulator 41 for carryingout EFM demodulation from the CD format provided to distinguish a partAa for recording accompaniment sound and vocal sound at the same time,and a part Ab for recording accompaniment sound only, where the part isunder the control of the control part 30, and a second demodulator 42for demodulating signals recorded in interleaved sectors for a CD-ROMfrom the signal received from the first demodulator 41 and applying thesecond demodulated signal to the audio processing part 70 under thecontrol of the control part 30, thereby demodulating the signal read infrom the CD format provided to distinguish a part Aa, for recordingaccompaniment sound and vocal sound at the same time, and a part Ab, forrecording accompaniment sound only, under the control of the controlpart 30.

The audio signal processing part 70 includes a CPU 71 for separatingaudio data and time data from the signal received from the seconddemodulator 42 under the control of the control part 30, a STC (SystemTime Clock) part 77 for generating a synchronizing signal using timeinformation received from the CPU 71, a memory 72 for storing the audiodata received from the CPU 71, an MPEG audio decoder 73 for decoding theMPEG audio data stored in the memory 72, a demultiplexer 74 forseparating data received form the MPEG audio decoder 73 into datacorresponding to accompaniment sound and vocal sound and datacorresponding to accompaniment sound and outputting the separated dataunder the control of the CPU 71, a first audio presentation part 75 forcomparing the PTS (Presentation Time Stamp) in the data corresponding tothe accompaniment sound received from the demultiplexer 74 to the signalreceived from the STC 77 to control presentation time of the data, and asecond audio presentation part 76 for comparing the PTS (PresentationTime Stamp) in the data corresponding to accompaniment sound and vocalsound received from the demultiplexer 74 to the signal received from theSTC 77 to control presentation time of the data, thereby processing theaudio signal using signals received from the demodulation part 40 toseparate the data into data corresponding to a first data containingaccompaniment sound only, and outputting the separate data.

The switch 50 selects one of the data corresponding to the accompanimentsound and vocal sound, or to only the accompaniment sound received fromthe first and the second audio presentation parts 75 and 76 of the audiosignal processing part 70 and transmits the selected data under thecontrol of the control part 30.

The D/A converter 60 converts the data received from the switch 50 underthe control of the control part 30.

The system and operation for processing a video signal is the same asfor a conventional karaoke CD system.

Operation of the device for controlling a karaoke CD audio signal inaccordance with this invention as described above is to be explainedhereinafter.

The encoded karaoke-CD data having coding information applied thereto isadded with a distinguishing value and has EFM signals demodulatedthrough the first demodulation part 41 which is a EFM/CIRC (CrossInterleave Read Solomon Code) and errors of the CD are corrected. Theinterleaved data at encoding is demodulated through the seconddemodulation part 42 which is a CD-ROM decoder, and is separated intoaudio, video, and time data in the CPU 71.

In the instant, of audio data, the demultiplexing signal coming in atthe reading in of the coding information is applied to the demultiplexer74 for operation of the demultiplexer 74.

Of the data demultiplexed in the CPU 71, the MPEG audio data is storedin the memory 72 temporarily, has the compression restored through theMPEG audio decoder 73, and is transmitted. The demodulated audio datareceived from the MPEG audio decoder 73 is separated into audio datacarrying accompaniment sound only and audio data carrying accompanimentsound and vocal sound through the demultiplexer 74, and applied to thefirst audio data presentation part 75 and the second audio presentationpart 76 respectively under the control of the CPU 71.

The audio demultiplexing signal received from the CPU 71 controls thefirst audio presentation part 75 to compare the received audio data Ab,carrying accompaniment sound only out of the audio signal appliedthereto, to a PTS to control the presentation time and controls thesecond audio presentation part 76 to compare the received audio data Aa,carrying voice, i.e., vocal sound and accompaniment sound out of theaudio signal applied thereto to a PTS to control the presentation time.The audio data received from the first and the second audio presentationparts 75 and 76 is applied to the D/A converter 60 through a switchingoperation of the switch 50 under the control of the control part 30,where it is converted in the D/A converter 60 and output to a speaker.

In this instant, the switch 50 is operated under the control of thecontrol part 30 which is operated according to the key signal appliedthrough the key matrix 80.

Operation of a karaoke CD audio system is to be explained hereinafter,referring to FIG. 7.

First, a subheader and packet header are read 100, and demultiplexing iscarried out to separate into an audio demultiplexing signal and a MPEGaudio signal 101. The separated MPEG audio signal is decoded to separateinto audio signals containing accompaniment sound only, and audiosignals containing both vocal sound and accompaniment sound using theaudio demultiplexing signal 102, and the PTS of each packet is read tosynchronize and transmit signals 103.

The MPEG audio format, as shown in FIG. 8, generates separated MPEGaudio signals Aa and Ab, and audio demultiplexing signals by extractingcoding information from the subheaders of each sector, and by readingthe packet header and comparing it to the STC, thereby the presentationtime of the data can be controlled.

As has been explained, this invention for a karaoke CD system increasesthe enjoyment of karaoke by reproducing audio data containing a player'svoice, i.e., vocal sound and accompaniment sound, and audio datacontaining accompaniment sound selectively, which permits stereophonysound corresponding to the CD sound.

Although the invention has been described in conjunction with specificembodiments, it is evident that many alternatives and variations will beapparent to those skilled in the art in light of the foregoingdescription. Accordingly, the invention is intended to embrace all ofthe alternatives and variations that fall within the spirit and scope ofthe appended claims.

1. A device for reproducing a digital signal recorded on a medium, thedigital signal including a video signal and an audio signal, the audiosignal being composed of data units, the data units corresponding to atleast one of: 1) a first type of digital audio data, and 2) a secondtype of digital audio data which includes at least one content differentfrom the first type of digital audio data; each data unit includingattribute information, which has: a) first information indicating acoding mode of the digital audio data, and b) second information,different than said first information, identifying the data unit as oneof the first type of digital audio data or the second type of digitalaudio data; the data units of audio signal being interleaved betweendata units of video signal, comprising: a demodulator for demodulatingthe digital signal to restore an original signal; a signal processor forreceiving the audio signal, demodulated by the demodulator, extractingthe second information, separating the data units corresponding to afirst type of audio signal from data units corresponding to a secondtype of audio signal based on the extracted second information, saidsignal processor including a system time clock, a memory for storing thedata units corresponding to the first type and the second type of audiosignal, and first or second audio presentation parts receiving thesystem time clock to control a presentation timing of the first type orthe second type of audio signal; and a controller, coupled to the signalprocessor, controlling the signal processor to output the data unitscorresponding to the first type or the second type of the audio signaldesignated by a user input, wherein the first or second type of audiosignal, designated by the user input, is identified using the secondinformation.
 2. A device as claimed in claim 1, wherein the first typeof audio signal corresponds to accompaniment sound.
 3. A device asclaimed in claim 1, wherein the audio signal is encoded by an MPEGcoding mode, wherein the signal processor further comprises: an MPEGaudio decoder for decoding the audio signal.
 4. A method for reproducinga digital signal recorded on a medium, said digital signal including avideo signal and an audio signal, the audio signal being composed ofdata units, the data units corresponding to at least one of: 1) a firsttype of digital audio data, and 2) a second type of digital audio datawhich includes at least one content different from the first type ofdigital audio data;  each data unit including attribute information,which has: a) first information indicating a coding mode of the digitalaudio data, and b) second information, different than said firstinformation, identifying the data unit as one of the first type ofdigital audio data or the second type of digital audio data;  the dataunits of audio signal being interleaved between data units of videosignal, the method comprising the steps of: demodulating the digitalsignal to restore an original signal; receiving the demodulated audiosignal; extracting the second information; separating the data unitscorresponding to a first type of audio signal from data unitscorresponding to a second type of audio signal based on the extractedsecond information, by storing the first and second types of audiosignals in a memory, receiving the data units corresponding to the firstand second types of audio signals in first and second audio presentationparts along with a system time clock to control a presentation timing ofthe first or second type of audio signal; and outputting one of thefirst or second types of audio signals in response to a user inputdesignating one of the first or second types of audio signals, whereinthe first or second type of audio signal, designated by the user input,is identified using the second information.
 5. The method of claim 4,wherein the step of separating includes separating the first type of theaudio signal representing accompaniment sound.
 6. A device forprocessing a digital signal, comprising: an audio signal processorreceiving data units of digital audio data, the data units correspondingto at least one of: 1) a first type of digital audio data, and 2) asecond type of digital audio data which includes at least one contentdifferent from the first type of digital audio data;  each data unitincluding attribute information, which has: a) coding informationindicating a coding mode of the digital audio data, and b)identification information, different than said coding information,identifying the data unit as one of the first type of digital audio dataor the second type of digital audio data; the audio signal processorextracting the identification information, and separating the data unitsof the first type from the data units of the second type using theidentification information, said signal processor including a systemtime clock, a memory for storing the data units of the first type andthe second type, and first and second audio presentation parts receivingthe system time clock to control a presentation timing of the data unitsof the first type or the second type; and a control circuit controllingthe audio signal processor to output an audio signal corresponding tothe data units of one of the first or second types, based on theidentification information.
 7. The device of claim 6, wherein the audiodata of the first type includes accompaniment sound.
 8. The device ofclaim 6, wherein the data units of digital audio data are interleavedwith digital video data, and wherein the audio data of the first typeincludes accompaniment sound and vocals, which are associated with thedigital video data.
 9. The device of claim 6, wherein the audio signalprocessor compares the system time clock to timing information in thedigital audio data, and outputs audio data with a timing based on thecomparison.
 10. The device of claim 6, wherein the audio signalprocessor MPEG decodes the audio data.
 11. The device of claim 6,further comprising: a demodulator demodulating the digital audio dataprior to receipt by the audio signal processor.
 12. A method forprocessing a digital signal, comprising: receiving data units of digitalaudio data, the data units corresponding to at least one of: 1) a firsttype of digital audio data, and 2)a second type of digital audio datawhich includes at least one content different from the first type ofdigital audio data;  each data unit including attribute information,which has: a) coding information indicating a coding mode of the digitalaudio data, and b) identification information, different than saidcoding information, identifying the data unit as one of the first typeof digital audio data or the second type of digital audio data;extracting the identification information; separating the data units ofthe first type from the data units of the second type using theidentification information by storing the data units of the first andsecond types in a memory, receiving the data units of the first andsecond types in first or second audio presentation parts along with asystem time clock to control a presentation timing of data units of thefirst or second type; and outputting audio data corresponding to thedata units of the first or second type in response to the identificationinformation.
 13. The method of claim 12, wherein the audio data of thefirst type includes accompaniment sound.
 14. The method of claim 12,wherein the data units of digital audio data are interleaved withdigital video data, and wherein the audio data of the first typeincludes accompaniment sound and vocals, which are associated with thedigital video data.
 15. The method of claim 12, further comprising:comparing the system time clock to timing information in the digitalaudio data; and outputting the audio data with a timing based on thecomparison.
 16. The device of claim 12, wherein the separating stepincludes MPEG decoding the audio data.
 17. The device of claim 1,wherein the signal processor includes a switch that selectively outputsthe data units of the first type or the second type.
 18. An apparatusfor processing a digital data, comprising: an audio/video data processorto receive data units of digital audio data and data units of digitalvideo data, the data units of digital audio data being multiplexed withdata units of digital video data, the data units of digital audio datacorresponding to at least one of: 1 ) a first type of digial audio data,and 2 ) a second type of digital audio data which includes at least onecontent different from the first type of digital audio data; each typeof digital audio data being specified by attribute information, whichhas: a) first information for indicating a coding mode of the digitalaudio data, and b) second information, different than said firstinformation, for identifying one of the first type of digital audio dataand the second type of digital audio data, and the digital video databeing associated with two types of digital audio data, the audio/videodata processor including an audio data processor configured to processthe first or second types of digital audio data and a video dataprocessor configured to process the digital video data, wherein theaudio processor is configured to extract the second information includedin the digital audio data, separate the first type of digital audio datafrom the second type of digital audio data using the second informationand process at least one of first and second types of digital audiodata, and the audio/video data processor including a system time clock,a data storage to store the first and second types of digital audio dataand the digital video data, an audio presentation part to receive thesystem clock to control a presentation timing of the first or secondtypes of digital audio data and a video presentation part to receive thesystem time clock to control a presentation timing of the digital videodata; and a control circuit, coupled to the audio/video data processor,to output an audio signal corresponding to the first or second types ofdigital audio data and the digital video data.
 19. The apparatus ofclaim 18, wherein the audio/video data processor further includes: ademultiplexer to separate the first type of digital audio data from thesecond type of digital audio data, by the second information.
 20. Theapparatus of claim 19, wherein the demultiplexer is further configuredto separate the digital audio data from the digital video data, by usingthe first information.
 21. The apparatus of claim 18, wherein the audiodata processor is configured to compare the system time clock to apresentation time information included in the digital audio data andoutput the first or second types of digital audio data with a timingbased on the comparison, and the video data processor is configured tocompare the system time clock to a presentation time informationincluded in the digital video data and output the digital video datawith a timing based on the comparison.
 22. The apparatus of claim 18,wherein the audio/video data processor is further configured to identifya coding mode of the digital video data based on a coding modeinformation, the coding mode for indicating MPEG video data, and whereinthe video data processor comprises an MPEG video decoder configured todecode the digital video data encoded in MPEG format.
 23. The apparatusof claim 22, wherein the audio/video data processor is furtherconfigured to identify the coding mode of the first or second types ofdigital audio data based on the first information, the coding mode forindicating MPEG audio data, and wherein the audio data processorcomprises an MPEG audio decoder configured to decode the digital audiodata encoded in MPEG format.
 24. The apparatus of claim 18, furthercomprising: a demodulator to demodulate the digital audio data and thedigital video data to an original data, prior to receipt by theaudio/video data processor.
 25. The apparatus of claim 18, wherein thecontrol circuit is further configured to receive a request fordesignating one of first and second types of digital audio data, andwherein the first or second type of audio data, designated by therequest, is identified using the second information.
 26. The apparatusof claim 18, further comprising: a D/A converter coupled to theaudio/video data processor to convert at least one of the first andsecond types of digital audio data and the digital video data to analogsignal, respectively.
 27. The apparatus of claim 18, wherein the atleast one of the first and second types of digital audio data includesvocal data, and wherein the audio data processor is configured toprocess the vocal data.
 28. A method for processing a digital data,comprising: receiving data units of digital audio data and data units ofdigital video data, the data units of digital audio data beingmultiplexed with data units of digital video data, the data units ofdigital audio data corresponding to at least two of: 1 ) a first type ofdigital audio data, and 2 ) a second type of digital audio data whichincludes at least one content different from the first type of digitalaudio data; each type of digital audio data being specified by attributeinformation, which has: a)first information for indicating a coding modeof the digital audio data, and b) second information, different thansaid first information, for identifying one of the first type of digitalaudio data and the second type of digital audio data, the digital videodata being associated with two types of digital audio data; extractingthe second information; separating the first type of digital audio datafrom the second type of digital audio data using the second information;processing the first or second types of digital audio data and thedigital video data; controlling a presentation timing of the first orsecond types of digital audio data and a presentation timing of digitalvideo data in response to a system time clock, wherein the first orsecond types of digital audio data is identified by the secondinformation, in response to a designation for selecting one of the firstand second types of digital audio data.
 29. The method of claim 28,further comprising: separating the digital audio data from the digitalvideo data, by using the first information.
 30. The method of claim 28,wherein the controlling step includes synchronizing the presentationtiming of the digital audio data to the system time clock and outputtingthe first or second types of digital audio data with a timing, andsynchronizing the presentation timing of the digital audio data to thesystem time clock and outputting the digital video data with a timing.31. The method of claim 28, further comprising: identifying a codingmode of digital video data based on a mode information included in thedigital video data, the coding mode for indicating MPEG video data, andwherein the processing step includes decoding the digital video dataencoded in MPEG format.
 32. The method of claim 31, further comprising:identifying the coding mode of the first or second types of digitalaudio data based on the first information, the coding mode forindicating MPEG audio data, and wherein the processing step includesdecoding the digital audio data encoded in MPEG format.
 33. The methodof claim 28, further comprising: demodulating the digital audio data andthe digital video data to an original data, prior to receipt by thereceiving step.
 34. The method of claim 28, further comprising:converting the designated first or second types of digital audio dataand the digital video data to analog signal, respectively.
 35. Themethod of claim 28, wherein the at least one of the first and secondtypes of digital audio data includes vocal data, and wherein theprocessing step processes the vocal data.